diff --git a/Lib/threading.py b/Lib/threading.py
index 13409db95ba..cf20152b4d7 100644
--- a/Lib/threading.py
+++ b/Lib/threading.py
@@ -133,7 +133,7 @@ class _RLock(_Verbose):
 
     def release(self):
         if self.__owner is not current_thread():
-            raise RuntimeError("cannot release un-aquired lock")
+            raise RuntimeError("cannot release un-acquired lock")
         self.__count = count = self.__count - 1
         if not count:
             self.__owner = None
@@ -227,7 +227,7 @@ class _Condition(_Verbose):
 
     def wait(self, timeout=None):
         if not self._is_owned():
-            raise RuntimeError("cannot wait on un-aquired lock")
+            raise RuntimeError("cannot wait on un-acquired lock")
         waiter = _allocate_lock()
         waiter.acquire()
         self.__waiters.append(waiter)
@@ -269,7 +269,7 @@ class _Condition(_Verbose):
 
     def notify(self, n=1):
         if not self._is_owned():
-            raise RuntimeError("cannot notify on un-aquired lock")
+            raise RuntimeError("cannot notify on un-acquired lock")
         __waiters = self.__waiters
         waiters = __waiters[:n]
         if not waiters: